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首页> 外文期刊>Materials & design >Effect of gear tooth fillet radius on the performance of injection molded Nylon 6/6 gears
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Effect of gear tooth fillet radius on the performance of injection molded Nylon 6/6 gears

机译：轮齿圆角半径对注塑尼龙6/6齿轮性能的影响

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摘要

In metal gears the gear manufacturing process and cutting tool dimensions decide the gear tooth geometry and affect the gear performance. In polymer base gears, injection molding process permits development of gears with any tooth geometry economically. In this paper, the effect of gear tooth fillet radius on the performance of injection molded Nylon 6/6 gear made with different tooth fillet radius 0.25 and 0.75 mm is reported. Finite element analysis carried out indicates high fillet root stresses and gear tooth deflection in gears with low fillet radius. Gear performance was evaluated using a power absorption type gear test rig. Repeated gear tooth loading during service causes a rise in the gear temperature which is due to hysteresis effects and friction. The temperature rise depends on the fillet radius. At low applied loads, gears with less fillet radius fail by crack initiation at the root region due to increased stress concentration whereas gears with large fillet radius fail by micro cracking at the pitch region.
机译：在金属齿轮中，齿轮的制造过程和切削刀具的尺寸决定了齿轮的齿形并影响齿轮的性能。在聚合物基齿轮中，注射成型工艺允许经济地开发具有任何齿几何形状的齿轮。本文报道了轮齿圆角半径对不同齿圆角半径为0.25和0.75 mm的Nylon 6/6注塑成型齿轮性能的影响。进行的有限元分析表明，在低圆角半径的齿轮中，圆角根部应力较高且轮齿偏斜。使用动力吸收式齿轮试验台评估齿轮性能。维修期间反复加载齿轮齿会导致齿轮温度升高，这归因于磁滞效应和摩擦。温升取决于圆角半径。在较低的施加载荷下，由于应力集中增加，圆角半径较小的齿轮由于在根部区域的裂纹引发而失效，而圆角半径较大的齿轮由于在螺距区域的微裂纹而失效。

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